KR101804021B1 - a dynamic load test apparatus of bridge long span - Google Patents

a dynamic load test apparatus of bridge long span Download PDF

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Publication number
KR101804021B1
KR101804021B1 KR1020150165235A KR20150165235A KR101804021B1 KR 101804021 B1 KR101804021 B1 KR 101804021B1 KR 1020150165235 A KR1020150165235 A KR 1020150165235A KR 20150165235 A KR20150165235 A KR 20150165235A KR 101804021 B1 KR101804021 B1 KR 101804021B1
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KR
South Korea
Prior art keywords
bridge
support frame
vehicle
dynamic load
load test
Prior art date
Application number
KR1020150165235A
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Korean (ko)
Other versions
KR20170061207A (en
Inventor
김종훈
Original Assignee
현대로템 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020150165235A priority Critical patent/KR101804021B1/en
Publication of KR20170061207A publication Critical patent/KR20170061207A/en
Application granted granted Critical
Publication of KR101804021B1 publication Critical patent/KR101804021B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/027—Specimen mounting arrangements, e.g. table head adapters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic load test apparatus for a long span bridge, and more particularly to a dynamic load test apparatus for a long span bridge, in which a dummy vehicle forming an actual weight of a vehicle and a mount capable of mounting a bridge are provided, The present invention relates to a dynamic load test apparatus for long-span bridges, which can more accurately evaluate the structural stability by measuring the influence of the dynamic load on the bridge structure for each section. The structure is designed to have the same weight and center of gravity as the actual vehicle to be passed through the bridge and a suspension device which is the same as the actual vehicle on the lower side And a vehicle driving means including a hydraulic winch mounted on each of the brackets and a bracket attached to each of the brackets through both ends of the support frame, The support frame includes a support frame coupling bracket coupled to the column frame, and a support link bracket is formed on both sides of the support frame.

Description

A dynamic load test apparatus of bridge long span for a long span bridge

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic load test apparatus for long span bridges, and more particularly to a dynamic load test apparatus for long span bridges, which comprises a dummy vehicle forming an actual weight of a vehicle and a mounting means for mounting the bridge, The present invention relates to a dynamic load test apparatus for long-span bridges, which is capable of more accurately evaluating the structural stability by measuring the influence of the dynamic load on the bridge structure.

Generally, long spans lead to a long gap between steel towers and bridges. Bridges: Facilities that allow water to cross or cross over from one high to the other. A load testing device is used.

However, since the conventional load testing device is configured to apply a static load to a local part, which is a part of the entire long span bridge structure, it is impossible to measure the influence that occurs in the bridge structure during the dynamic behavior of the vehicle, The stability can not be evaluated.

In order to evaluate the effect of the dynamic behavior of the vehicle on the bridge structure, a dynamic coefficient is applied to the result of the static load test device to predict the approximate result. The design and installation (construction) of the bridge structure is not easy because it does not properly reflect the dynamic behavior of the vehicle and the characteristics of the suspension, (Construction) of the bridge due to insufficient design.

Also, in order to obtain a more accurate predicted value, a method of passing an actual vehicle through a separate test site has been performed. However, this has caused a problem of causing human injury of a rider aboard an actual vehicle when a bridge is cut due to insufficient design.

Korean Patent Publication No. 10-2011-0115382

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a long-span bridge in which a dumper vehicle having the same weight as an actual vehicle is repeatedly moved The bridge structure is designed to prevent damage caused by damage to the bridge structure caused by the dynamic load test using the actual vehicle and to improve the accuracy of the dynamic load test. And to provide a dynamic load test apparatus for a long-span bridge capable of quickly and easily constructing the bridge.

According to an aspect of the present invention, there is provided a bridge structure comprising: a mounting means for mounting a bridge and including a column frame and a support frame; And a vehicle driving means including a hydraulic winch installed on each of the brackets and a bracket attached to both ends of the support frame, In the dynamic load testing apparatus for a long span bridge, the support frame is provided with a support frame coupling bracket coupled to the column frame, and a support link bracket is formed on both sides of the support frame.

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And the guide frame is coupled to the support frame through a support link bracket formed on both sides of the support frame.

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And a rotation driving part is formed on both sides of the support frame.

And the rotary drive unit may include a hydraulic cylinder having a piston rod hinged to a link ring coupled to the guide panel at one end.

As described above, according to the present invention, it is possible to more accurately grasp the influence and results of a bridge structure in a dynamic behavior through a bridge cradle supporting a long span bridge and an unmanned dummy vehicle having the same weight as a real vehicle, The safety of the personnel can be improved, and the dynamic load test time and labor cost can be saved.

Further, the present invention has the effect of rapidly and easily constructing a long-span bridge satisfying the design conditions by increasing the accuracy of the dynamic load test by repeatedly moving the dummy vehicle having the same weight as the actual vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a principal part decomposition state of an apparatus for dynamic load testing of a long-span bridge according to a preferred embodiment of the present invention. FIG.
Fig. 2 is a view showing the coupling state of Fig. 1. Fig.
3 is a view schematically showing a frontal state in which a gantry crane is installed on an upper portion of a long-span bridge installed through a mounting means and a vehicle driving means according to the present invention.
FIG. 4 is a view schematically showing a state in which a dummy vehicle is seated on an upper portion of a long-span bridge using the gantry crane of FIG. 3. FIG.
5 is a view schematically showing a use state of the dynamic load testing apparatus of a long span bridge according to a preferred embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a dynamic load test apparatus for a long span bridge according to the present invention will be described in more detail with reference to the accompanying drawings.

Hereinafter, elements having the same function in all the following drawings will be denoted by the same reference numerals, and repetitive description will be omitted. Further, the following terms are defined in consideration of functions in the present invention, Should be interpreted as.

1 to 5, the dynamic load testing apparatus 100 for long-span bridges according to the present invention is roughly divided into a docking station 110, a dummy car 120, and a vehicle drive unit 130.

The mounting means 110 is for mounting a bridge panel 200 on a base of a place where the device is used and is to be used. And a supporting frame 112. [

Here, the column frame 111 is formed in a circular shape or a square shape, and a plurality of the column frames 111 are spaced apart from each other in the width (width) direction before and after the longitudinal direction so as to safely mount the bridge panel 200.

A column frame engaging bracket 111a is provided on the upper surface of the column frame 111 so as to be coupled with the receiving frame 112 by a fastening pin P and to form a tilt at a predetermined angle as required.

Between the pair of column frames 111 provided on the front end side and the rear end side of the bridge panel 200, one or a plurality of support frames 111b are formed so as to strengthen the supporting force and prevent a change in width in the width direction do.

The support frame 112 is positioned in the width direction through the upper surface of each column frame 111 and the lower frame has a support frame engagement bracket 112a (not shown) coupled to the column frame engagement bracket 111a by the engagement pin P And guide link brackets 141 provided on both sides of the guide panel 140 and support link brackets 112b for engaging with each other are formed on both sides of the upper surface.

The guide panel 140 is formed with guide link brackets 141 at both ends thereof, and a fixing bracket 142 is formed at one side of the guide links.

Rotation drive portions 113 for rotating the guide panel 140 up and down are firmly fixed to both sides of the support frame 112 by welding or fastening means.

The rotary drive unit 113 includes a hydraulic cylinder 113c having a piston rod 113b hinged to a link ring 113a coupled to a fixing bracket 142 of the guide panel 140 at one end thereof desirable.

In addition, the rotation driving part 113 and the guide panel 140 are coupled by a linkage (linking) method of a mechanical part composed of a combination of links connecting two rotating pairs.

When the hydraulic cylinder 113c is operated, the piston rod 113b is expanded and contracted and the link ring 113a is coupled to the fixing bracket (not shown) of the guide panel 140 142 to rotate the guide panel 140 upward and downward.

Accordingly, when the bridge panel 200 is mounted on the mounting means 110, the hydraulic cylinder 113c is operated to rotate the guide panel 140 downward, so that the bridge panel 200 is not lifted to an excessive height The risk can be minimized and the bridge panel 200 can be seated at the correct position by securing the visor of the constructor.

It is preferable that the dummy vehicle 120 is designed to be assembled in various types so as to have the same weight and center of gravity as the actual vehicle to be passed through the bridge, And before and after the guide 122 is formed.

The guide 122 serves to guide the bridge panel 200 along the guide panel 140 when the dummy vehicle 120 moves over the bridge panel 200.

The vehicle driving means 130 includes a bracket 131 attached to both ends of the support frame 112 through a front end or a rear end thereof and a hydraulic winch installed on each of the brackets 131 A large force can be obtained), and (132).

The hydraulic winch 132 includes a cylindrical drum 132a, a wire rope 132b wound on the drum 132a, a hook formed on one end of the wire rope 132b, Etc.), and (132c).

Here, the hydraulic winch 132 according to the present invention uses a hydraulic motor or an internal combustion engine to rotate the drum 132a so as to pull or unwind the wire rope 132b.

The hydraulic winch 132 is preferably driven by a hydraulic motor.

Further, it is preferable that a clutch or a brake is mounted on the drum 132a so that power can be transmitted or disconnected.

The vehicle drive means 130 having such a configuration releases the tension of the wire rope 132b of the hydraulic winch 132 and connects hooks 132c before and after the dummy vehicle 120 The drum 132a is rotated using a hydraulic motor or an internal combustion engine to draw or unwind the wire rope 132b to move the dummy vehicle 120 forward and backward in the bridge panel 200. [

The bridge panel 200 may be lifted up to both sides of the upper portion of the bridge panel 200 installed through the mounting means 110 to seat the bridge panel 200 on the mounting means 110 or to lift the dummy vehicle 120, A gantry crane 150 for placing a gantry crane on the upper surface of the bridge panel 200 and a bridge for carrying the car over the beam in the form of a bridge) Respectively.

The operation state of the present invention having the above-described structure will now be described.

First, when a dynamic load test of a long span bridge is performed using the dynamic load testing apparatus according to the present invention, two gantry cranes 150 are used as an upper surface of a support frame 112 installed on a column frame 111 After the bridge panel 200 is lifted, it is seated at a designated position.

Next, the dummy vehicle 120 is set on the ground so as to match the weight and the center of gravity of the actual vehicle to be tested, and is then mounted on the bridge using the gantry crane 150.

Thereafter, the hydraulic cylinder 113c mounted on the support frame 112 is operated to raise both the guide panels 140. [

Subsequently, the tension of the wire rope 132b of the hydraulic winch 132 mounted on the front end and the rear end of the support frame 112 is released to release hooks 132c from the front of the dummy vehicle 120 , Respectively.

Next, the drum 132a of one hydraulic winch 132 is rotated by pulling the wire rope 132b using a hydraulic motor or an internal combustion engine to move the dummy vehicle 120 forward or backward from the bridge panel 200 The structural stability of each part of the bridge panel 200 is evaluated.

After completion of the dynamic load test of the long span bridge, the dismantling of the dynamic load test apparatus according to the present invention is preferably carried out in the reverse order of the installation method.

Accordingly, the dynamic load testing apparatus according to the present invention can secure the performance of the dynamic load test by using the same dummy vehicle as the unmanned actual vehicle, and obtain more accurate results in comparison with the conventional load testing apparatus. And automatic repetition is possible, so that load test time and labor cost can be saved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. And will be apparent to those skilled in the art to which the invention pertains.

100: Dynamic load test apparatus 110: Mounting means
111: column frame 111a: column frame engaging bracket
111b: support frame 112: support frame
112a: a base frame coupling bracket 112b: a base link bracket
113: rotation driving part 113a: link loop
113b: piston rod 113c: hydraulic cylinder
120: Dummy vehicle 121: Suspension device
122: Guide 130: Vehicle passive means
131: Bracket 132: Hydraulic winch
132a: drum 132b: wire rope
132c: Hook 140: Guide panel
141: Guide link bracket 142: Fixed link
150: Gantry crane 200: Bridge panel

Claims (7)

delete A mounting means including a column frame and a support frame for mounting the bridge and a suspension device designed to have the same weight and center of gravity as the actual vehicle to be passed through the bridge, There is provided an apparatus for dynamic load testing of a long-span bridge including a dummy vehicle having a guide formed before and after a vehicle, a bracket attached to both ends of the support frame, and a vehicle drive means comprising a hydraulic winch mounted on each of the brackets ,
Wherein the support frame comprises a support frame coupling bracket coupled to the column frame and the support link brackets are formed on both sides of the support frame. The method of claim 2,
Wherein the guide frame is coupled to the support frame through a support link bracket formed on both sides of the support frame. delete delete The method of claim 2,
And a rotation driving part is formed on both sides of the support frame. The method of claim 6,
Wherein the rotary drive unit comprises a hydraulic cylinder having a piston rod hinged to a link ring coupled to a guide panel at one end thereof.
KR1020150165235A 2015-11-25 2015-11-25 a dynamic load test apparatus of bridge long span KR101804021B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150165235A KR101804021B1 (en) 2015-11-25 2015-11-25 a dynamic load test apparatus of bridge long span

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150165235A KR101804021B1 (en) 2015-11-25 2015-11-25 a dynamic load test apparatus of bridge long span

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KR20170061207A KR20170061207A (en) 2017-06-05
KR101804021B1 true KR101804021B1 (en) 2017-12-04

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108760536B (en) * 2018-04-10 2020-12-11 东南大学 Device and method for researching performance of pier under axial load and explosion action
CN110108427B (en) * 2019-05-06 2021-01-15 黄河科技学院 Bridge loading simulation test device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101233058B1 (en) 2011-11-17 2013-02-13 주식회사 로드코리아 Apparatus for accelerated pavement test

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101233058B1 (en) 2011-11-17 2013-02-13 주식회사 로드코리아 Apparatus for accelerated pavement test

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